CCW Medicaid Data White Papers

This overview provides background information and considerations for users of the Chronic Condition Data Warehouse's (CCW) Medicaid data. In this paper, we provide an overview of the characteristics of Medicaid, highlighting important points for researchers interested in cross-State or within-State comparisons. We describe some of the major types of variation across the States and provide topics for researchers to consider when designing studies using Medicaid data in general, and the CCW data in particular.

Previous studies have found that Medicaid enrollees have higher rates of emergency department (ED) utilization compared to Medicare, private insurance and uninsured populations. In an effort to provide a more comprehensive and nuanced understanding of ED utilization in Medicaid, we explore utilization patterns for different subpopulations of Medicaid.

In this report macro validation is used as a strategy to validate encounter data from the Chronic Condition Data Warehouse (CCW). Metrics were calculated from the data and used to measure completeness across states and Medicaid populations.

The purpose of this data brief is to provide researchers with information on how to use the Centers for Medicare & Medicaid Services' (CMS) Chronic Condition Data Warehouse (CCW) to analyze Medicaid long-term services and supports populations and their service utilization.

The purpose of this data brief is to illustrate how researchers and policymakers can use data from the Centers for Medicare & Medicaid Services' Chronic Condition Data Warehouse (CCW) to assess Medicaid enrollees' utilization of ambulatory services.

This website was developed under contract with the Centers for Medicare & Medicaid Services (CMS).